Linux Advanced

What is Cgroup?

A Linux kernel feature that limits, accounts for, and isolates resource usage of process groups.

Control groups (cgroups) are a fundamental building block of containers. They limit and monitor CPU, memory, disk I/O, and network bandwidth for groups of processes. Docker and Kubernetes use cgroups extensively.

Cgroups v2 (unified hierarchy) is the modern implementation. Key controllers include cpu, memory, io, and pids. Systemd integrates with cgroups for service resource management via resource control directives in unit files.

Related Terms

The superuser account in Unix/Linux systems with unrestricted access to all commands and files.

Network Namespace

A Linux kernel feature that provides isolated network stacks with independent interfaces, routing tables, and firewall rules.

A stream editor for filtering and transforming text, commonly used for find-and-replace operations in files.

The Grand Unified Bootloader, a program that loads the operating system kernel into memory during system startup.

A command to change file and directory access permissions using numeric or symbolic notation.

A command to change the owner and group of files and directories in Linux.

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